Granted Patent
Utility
US 4,826,937 · App. 07/087,354
Thermoplastic interpolymers of methyl methacrylate, N-substituted maleimides, and alkyl acrylates
Inventor:
Barry D. Dean
Patented Case
View Patent ↗
Granted: May 2, 1989
Filed: Aug 20, 1987
Inventor
Barry D. Dean
Assignee (at issue)
Arco Chemical Technology, L.P.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.